How does the graph below change between point a and point b
the graph increases.
the graph decreases.
the graph decreases, then increases.
the graph increases, then decreases.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Find the root(s) of f (x) = (x- 6)2(x + 2)2.